Profiling and Debugging with Xdebug
David P. Sklar · Apress eBooks · 2004
Learn how to efficiently optimize your PHP programs with the Xdebug extension. With it, you can examine the flow of function calls in your programs and get detailed statistics about how long it takes for each function to execute. By focusing your efforts on the slowest parts of your program, you get the most out of the time spent optimizing and debugging.